diff options
Diffstat (limited to 'runtime/stack.cc')
| -rw-r--r-- | runtime/stack.cc | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/runtime/stack.cc b/runtime/stack.cc index e49bc1d78f..a566886d73 100644 --- a/runtime/stack.cc +++ b/runtime/stack.cc @@ -19,6 +19,7 @@ #include "arch/context.h" #include "base/hex_dump.h" #include "entrypoints/runtime_asm_entrypoints.h" +#include "gc_map.h" #include "mirror/art_method-inl.h" #include "mirror/class-inl.h" #include "mirror/object.h" @@ -151,6 +152,33 @@ size_t StackVisitor::GetNativePcOffset() const { return GetMethod()->NativeQuickPcOffset(cur_quick_frame_pc_); } +bool StackVisitor::IsReferenceVReg(mirror::ArtMethod* m, uint16_t vreg) { + // Process register map (which native and runtime methods don't have) + if (m->IsNative() || m->IsRuntimeMethod() || m->IsProxyMethod()) { + return false; + } + if (m->IsOptimized(sizeof(void*))) { + return true; // TODO: Implement. + } + const uint8_t* native_gc_map = m->GetNativeGcMap(sizeof(void*)); + CHECK(native_gc_map != nullptr) << PrettyMethod(m); + const DexFile::CodeItem* code_item = m->GetCodeItem(); + // Can't be null or how would we compile its instructions? + DCHECK(code_item != nullptr) << PrettyMethod(m); + NativePcOffsetToReferenceMap map(native_gc_map); + size_t num_regs = std::min(map.RegWidth() * 8, static_cast<size_t>(code_item->registers_size_)); + const uint8_t* reg_bitmap = nullptr; + if (num_regs > 0) { + Runtime* runtime = Runtime::Current(); + const void* entry_point = runtime->GetInstrumentation()->GetQuickCodeFor(m, sizeof(void*)); + uintptr_t native_pc_offset = m->NativeQuickPcOffset(GetCurrentQuickFramePc(), entry_point); + reg_bitmap = map.FindBitMap(native_pc_offset); + DCHECK(reg_bitmap != nullptr); + } + // Does this register hold a reference? + return vreg < num_regs && TestBitmap(vreg, reg_bitmap); +} + bool StackVisitor::GetVReg(mirror::ArtMethod* m, uint16_t vreg, VRegKind kind, uint32_t* val) const { if (cur_quick_frame_ != nullptr) { |